<template>
  <view v-if="goods_info.goods_name" class="goods-detail-container">
    <!-- 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item, index) in goods_info.pics" :key="index">
        <image :src="item.pics_big" @click="preview(index)"></image>
      </swiper-item>
    </swiper>
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品的价格 -->
      <view class="price">
        ¥{{goods_info.goods_price}}
      </view>
      <!-- 商品信息主体 -->
      <view class="goods-info-body">
        <!-- 商品的名字 -->
        <view class="goods-name">
          {{goods_info.goods_name}}
        </view>
        <!-- 商品收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">
        快递：免运费
      </view>
    </view>
    <!-- 富文本内容 -->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    <!-- 商品导航组件区域 -->
    <view class="goods_nav">
      <!-- fill 控制右侧按钮的样式 -->
      <!-- options 左侧按钮的配置项 -->
      <!-- buttonGroup 右侧按钮的配置项 -->
      <!-- click 左侧按钮的点击事件处理函数 -->
      <!-- buttonClick 右侧按钮的点击事件处理函数 -->
      <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
    </view>
  </view>
</template>

<script>
  import { mapState, mapMutations, mapGetters } from 'vuex'
  export default {
    computed: {
      ...mapState('m_cart', []),
      ...mapGetters('m_cart', ['total'])
    },
    watch: {
      // total(newVal) {
      //   const findResult = this.options.find(x => x.text === '购物车')
      //   if (findResult) {
      //     findResult.info = newVal
      //   }
      // }
      // 使用对象的形式来定义 watch 侦听器,可以能够在渲染页面时得到相关的数据
      total: {
        handler(newVal) {
          const findResult = this.options.find(x => x.text === '购物车')
          if (findResult) {
            findResult.info = newVal
          }
        },
        immediate: true
      }
    },
    data() {
      return {
        // 商品详情对象
        goods_info: {},
        // 左侧按钮组的配置对象
        options: [{
          icon: 'shop',
          text: '店铺'
        }, {
          icon: 'cart',
          text: '购物车'
        }],
        // 右侧按钮组的配置对象
        buttonGroup: [{
            text: '加入购物车',
            backgroundColor: '#ff0000',
            color: '#fff'
          },
          {
            text: '立即购买',
            backgroundColor: '#ffa200',
            color: '#fff'
          }
        ]
      };
    },
    onLoad(options) {
      // console.log(options)
      const goods_id = options.goods_id
      this.getGoodsDetail(goods_id)
    },
    methods: {
      ...mapMutations('m_cart', ['addToCart']),
      async getGoodsDetail(goods_id) {
        const { data: res } = await uni.$http.get('/api/public/v1/goods/detail', { goods_id })
        if (res.meta.status !== 200) return uni.$showMsg()
        // 为 data 中的数据赋值
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display:block;" ').replace(/webp/g, 'jpg')
        this.goods_info = res.message
      },
      preview(i) {
        // 调用 uni.previewImage() 方法预览图片
        uni.previewImage({
          // 预览时，默认显示图片的索引
          current: i,
          // 所有图片 url 地址的数组
          urls: this.goods_info.pics.map(x => x.pics_big)
        })
      },
      onClick(e) {
        // console.log(e)
        if (e.content.text === '购物车') {
          uni.switchTab({
            url: '/pages/cart/cart'
          })
        }
      },
      buttonClick(e) {
        console.log(e)
        if (e.content.text === '加入购物车') {
          // 组织商品的信息对象，调用addToCart 方法
          const goods = {
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo: this.goods_info.goods_small_logo,
            goods_state: true
          }
          // 调用addToCart方法
          this.addToCart(goods)
        }
      }
    }
  }
</script>

<style lang="scss">
swiper {
  height: 750rpx;

  image {
    width: 100%;
    height: 100%;
  }
}
.goods-info-box {
  padding: 10px;
  padding-right: 0;
  .price {
    color: #C00000;
    font-size: 18px;
    margin: 10px 0;
  }
  .goods-info-body {
    display: flex;
    justify-content: space-between;
    .goods-name {
      font-size: 13px;
      margin-right: 10px;
    }
    .favi {
      width: 120px;
      font-size: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      border-left: 1px solid #efefef;
      color: gray;
    }
  }
  .yf {
    font-size: 12px;
    color: gray;
    margin: 10px 0;
  }
}
.goods_nav {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
}
.goods-detail-container {
  padding-bottom: 50px;
}
</style>
